The MSI PCB includes a 8+6-pin power connector instead of an 8-pin one, which should provide more stability for the overclocked core. Despite the increased boost speeds, the TGP matches the reference 170 W. The number of inductors appears to be modified as well, and the PCB supports 8 VRAM slots, of which only 6 are populated. Unfortunately, we will not be seeing 16 GB versions, due to the limitations imposed by the 192-bit memory bus.
https://www.notebookcheck.net/First-look-at-MSI-s-custom-RTX-3060-PCB-design-for-the-Gaming-X-series.523982.0.html